CN114122539A

CN114122539A - Battery system distribution box and battery pack

Info

Publication number: CN114122539A
Application number: CN202111342213.9A
Authority: CN
Inventors: 雷蕾; 马建生; 薛国正
Original assignee: Hozon New Energy Automobile Co Ltd
Current assignee: Hozon New Energy Automobile Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-03-01

Abstract

The invention provides a battery system distribution box for a vehicle, the vehicle having a width direction. The battery system distribution box comprises a positive distribution box and a negative distribution box, the positive distribution box contains devices in a positive circuit, the positive circuit is used for communicating the positive input end and the positive output end, the negative distribution box is separately arranged from the positive distribution box in the width direction and contains devices in a negative circuit, and the negative circuit is used for communicating the negative input end and the negative output end. The invention also provides a battery pack comprising the battery system distribution box. Adopt above-mentioned battery system block terminal can solve the not enough problem of vehicle Z to space.

Description

Battery system distribution box and battery pack

Technical Field

The invention relates to a distribution box of a battery system and also relates to a battery pack.

Background

With the development of new energy technology, new energy products are increasingly popularized. As one of representatives of new energy products, electric vehicles have become a hot spot of research. In the assembly of an electric vehicle, a battery system distribution box is an important electrical control component thereof. Due to the adoption of the design of the battery system distribution box, the installation space of automobile components can be reduced, and the installation cost of the whole automobile can be reduced.

At present, the yield of the four-wheel drive and range-extended electric vehicle is obviously increased, and the chassis is lower in the design process of the four-wheel drive and range-extended electric vehicle. This situation leaves the Z-direction requirements of the individual components more challenging, especially for short battery packs, where the Z-direction space is particularly inadequate.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a battery system distribution box and a battery pack, which can solve the problem of insufficient space in the Z direction of a vehicle.

The invention provides a battery system distribution box for a vehicle, the vehicle having a width direction. The battery system distribution box comprises a positive distribution box and a negative distribution box, the positive distribution box contains devices in a positive circuit, the positive circuit is used for communicating the positive input end and the positive output end, the negative distribution box is separately arranged along the width direction from the positive distribution box and contains devices in a negative circuit, and the negative circuit is used for communicating the negative input end and the negative output end.

In one embodiment, the positive circuit comprises a positive main circuit, and the devices in the positive main circuit comprise a main positive relay; the positive circuit further comprises a pre-charging circuit connected with the positive main circuit in parallel, and devices in the pre-charging circuit comprise a pre-charging relay and/or a pre-charging resistor; and/or the device in the negative pole circuit comprises a main negative relay and/or a main fuse.

In one embodiment, the main positive relay and/or the main negative relay is a horizontal relay.

In one embodiment, the horizontal relay is arranged such that a central axis of a coil thereof extends in a width direction.

In one embodiment, the vehicle has a height direction; each of the positive and negative distribution boxes includes upper and lower cases separated in a height direction, and the upper and lower cases are detachably connected by a fastener.

In one embodiment, at least a portion of an upper surface of the upper housing of each distribution box, which is provided with a mounting site for mounting a battery management system, is provided with a flatness of less than 0.5 mm.

In one embodiment, a relay is accommodated in the distribution box, and heat dissipation holes are formed in the upper housing and the lower housing of the distribution box at positions corresponding to the relay; and/or, a fuse is contained in the distribution box, and a heat dissipation hole is formed in the position, corresponding to the fuse, of the upper shell of the distribution box.

The invention also provides a battery pack for a vehicle having a fore-aft direction. The battery pack comprises a battery module and the battery system distribution box, wherein the battery system distribution box is located on the front side of the battery module.

In one embodiment, the battery pack further includes a water cooling pipe for cooling the battery module, the water cooling pipe being disposed to pass through a space between a positive distribution box and a negative distribution box of the battery system distribution box.

In one embodiment, the battery pack further comprises a battery compartment, wherein the battery compartment provides a first receiving area in a rectangular shape and a second receiving area in a trapezoidal shape for receiving the battery module and the battery system distribution box, respectively, wherein a bottom side of the trapezoidal shape on the rear side coincides with a front side of the rectangular shape on the front side.

Above-mentioned battery system block terminal divide into along the anodal block terminal and the negative pole block terminal of the width direction separation setting of vehicle, can make full use of vehicle in the ascending space of width direction, and reduce the ascending size in direction of height, promptly, the Z that occupies can show to the space and reduce, can solve vehicle Z to the problem that the space is not enough, does benefit to the arrangement requirement of sedan-chair sports car type very much. Moreover, the devices in the positive electrode circuit and the negative electrode circuit are separately housed, not only facilitating the device arrangement, but also being less likely to interfere with each other.

Above-mentioned battery package adopts above-mentioned battery system block terminal to make the water-cooling pipe pass between positive pole block terminal and the negative pole block terminal in the ascending space of width direction and cross, not only convenient cooling, arrange easily, do not occupy Z to the space moreover, further solve vehicle Z to the not enough problem in space.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of an exemplary battery pack.

Fig. 2 is a schematic diagram of an exemplary positive electrode circuit.

Fig. 3 is a schematic diagram of an exemplary negative pole circuit.

Fig. 4 is a rear view of an exemplary positive distribution box.

Fig. 5 is a top view of an exemplary positive distribution box.

Fig. 6 is an exploded view of an exemplary positive distribution box.

Fig. 7 is a schematic diagram illustrating the arrangement of devices in an exemplary positive distribution box.

Fig. 8 is a rear view of an exemplary negative distribution box.

Fig. 9 is a top view of an exemplary negative distribution box.

Fig. 10 is an exploded view of an exemplary negative distribution box.

Fig. 11 is a schematic diagram showing the arrangement of devices in an exemplary negative distribution box.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth further details for the purpose of providing a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms other than those described herein, and it will be readily apparent to those skilled in the art that the present invention may be embodied in many different forms without departing from the spirit or scope of the invention.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

The battery system distribution box, also called BDU, is an important electrical control component in an electric vehicle. As the installation space requirement for the vehicle components is higher and higher, the installation space requirement in the battery pack is also higher and higher.

Referring to fig. 1, the present invention provides a battery system distribution box 10 for a vehicle (not shown). The vehicle has a width direction X0, a front-rear direction Y0, and a height direction Z0. The vehicle width direction X0, the front-rear direction Y0, and the height direction Z0 are also commonly referred to as the X direction, the Y direction, and the Z direction, wherein the height direction Z0 is also the up-down direction, the width direction X0 is also the left-right direction, and the front-rear direction Y0 is also substantially the longitudinal direction of the vehicle. It will be understood that spatial relational terms, such as "front," "rear," "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures, with reference to the orientation as disposed in the vehicle of FIG. 1.

The battery system distribution box 10 includes a positive distribution box 1 and a negative distribution box 2.

The positive distribution box 1 accommodates the components in the positive circuit S1. The device in the positive electrode circuit S1, that is, the electronic component provided in the positive electrode circuit S1 may be, for example, a resistor, a capacitor, an inductor, a fuse, a switching element such as a relay, or the like. Fig. 2 shows a schematic diagram of the positive electrode circuit S1. The positive electrode circuit S1 is for connecting the input terminal positive electrode (input + in fig. 2) and the output terminal positive electrode (output + in fig. 2). Connected, i.e., turned on, so that current can flow from the input terminal anode to the output terminal anode.

The negative distribution box 2 is provided separately from the positive distribution box 1 in the width direction X0. The negative distribution box 2 houses the components in the negative circuit S2. Similarly, the device in the negative electrode circuit S2, that is, the electronic component provided in the negative electrode circuit S2, may be, for example, a resistor, a capacitor, an inductor, a fuse, a switching element such as a relay, or the like. Fig. 3 shows a schematic diagram of the negative pole circuit S2. The negative pole circuit S2 is used to connect the negative pole of the input terminal (in fig. 2, input-) and the negative pole of the output terminal (in fig. 2, output-). That is, the negative electrode circuit S2 allows current to flow between the input terminal negative electrode and the output terminal negative electrode.

The battery system distribution box 10 is divided into the positive distribution box 1 and the negative distribution box 2 which are separately arranged along the width direction X0, the space of a vehicle in the width direction X0 can be fully utilized, the size of the vehicle in the height direction Z0 is reduced, namely, the occupied Z-direction space can be obviously reduced, and the arrangement requirement of a sedan type is particularly facilitated.

The above-described battery system distribution box 10 may be disposed in the battery pack 100, which is particularly advantageous for a flat-table design of the battery pack 100. The above-described battery system distribution box 10, which is split in the width direction D1, also facilitates the arrangement of the cold water pipe 30 for cooling the battery modules 20 in the battery pack 100, which will be described in further detail below. The battery system distribution box 10 can be called as a short split type distribution box, and can solve the problem that the Z-direction height space of a short battery pack is insufficient.

In actual operation, the generator, the charging pile, and the like may charge the battery modules 20 in the battery pack 100 through the battery system distribution box 10. That is, the generator, the charging pile, and the like turn on the input terminal positive electrode and the input terminal negative electrode as the power output unit, and the battery module 20 turns on the output terminal positive electrode and the output terminal negative electrode as the power receiving unit to store power. The battery modules 20 in the battery pack 100 may also supply power to various loads in the vehicle, such as an electric motor, through the battery system distribution box 10. That is, the battery module 20 turns on the input terminal positive electrode and the input terminal negative electrode as the power output unit, and the vehicle load turns on the output terminal positive electrode and the output terminal negative electrode as the power receiving unit or uses the power.

It will be appreciated that the positive pole circuit S1 and the negative pole circuit S1 both serve as line segments in the power distribution circuit connecting the output terminals to the input terminals. After the positive electrode circuit S1 and the negative electrode circuit S1 communicate the power output unit and the power receiving unit, a closed circuit may be formed.

In fig. 2, the positive electrode circuit S1 includes a positive electrode main circuit S10. The devices in the positive main circuit S10 may include a main positive relay K1. In fig. 2, the positive circuit S1 may further include a precharge circuit S11 connected in parallel with the positive main circuit S10. The devices in the pre-charge circuit S11 may include a pre-charge relay Kp and/or a pre-charge resistor Rp, and in the illustrated embodiment, the devices in the pre-charge circuit S11 include the pre-charge relay Kp and the pre-charge resistor Rp. The devices in the precharge circuit S11 may also include a precharge resistor Rp. It is understood that the devices in the pre-charge circuit S11 include a pre-charge relay Kp and a pre-charge resistor Rp, that is, the pre-charge relay Kp and the pre-charge resistor Rp are disposed in series in the pre-charge circuit S11.

In fig. 3, the devices in the negative circuit S2 may include a main negative relay K2 and/or a main fuse Fu. In the illustrated embodiment, the devices in the negative circuit S2 include a main negative relay K2 and a main fuse Fu.

It is to be understood that "and/or" herein is merely one type of association relationship describing an associated object, indicating that three types of relationships may exist. By way of example, the first component and/or the second component may represent: the first component exists alone, the first component and the second component exist simultaneously, and the second component exists alone. In addition, when the character "/" is used herein, it generally means that the preceding and following related objects are in an "or" relationship. It is also to be understood that the terms "first", "second", etc. are used herein to define features only for the purpose of distinguishing between corresponding features, and are not intended to limit the scope of the present invention in any way unless otherwise specified.

The battery pack 100 may include a battery management system (not shown). The battery management system may also be referred to as a BMS. In the illustrated embodiment, when the battery management system receives a power-up command, the pre-charge relay Kp may be closed first. At this time, the precharge circuit S11 in the positive electrode circuit S1 turns on the input terminal positive electrode and the output terminal positive electrode. When the output voltage is a predetermined proportion of the input voltage, such as 98% or 95%, pre-charge relay Kp may be opened, and main positive relay K1 and main negative relay K2 may be closed, for example, to input current to the vehicle motors. At this time, the positive main circuit S10 in the positive circuit S1 turns on the input terminal positive electrode and the output terminal positive electrode.

The main fuse Fu serves as a main fuse and can be fused in time when a short circuit occurs in a main loop, so that other components are protected. In the embodiment shown in fig. 3, the device in the negative electrode circuit S2 may further include a shunt Sa. The current divider Sa can collect charge and discharge current values and report the charge and discharge current values to the battery management system.

In one embodiment, the positive distribution box 1 and/or may also house corresponding connectors, copper bars, low voltage wiring harnesses, and the like. It is understood that the use of particular words herein to describe one embodiment of the invention, such as "one embodiment," "another embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the invention. Therefore, it is emphasized and should be appreciated that two or more references to "one embodiment" or "another embodiment" in various places throughout this specification are not necessarily to the same embodiment. Furthermore, some of the features, structures, or characteristics of one or more embodiments of the present invention may be combined as suitable.

It is to be understood that references herein to two directions being "perpendicular", "coincident", "parallel", etc. are not required to satisfy mathematically strict angular requirements, but are to allow for a range of tolerances, for example, within 20 °, preferably within 5 ° compared to mathematically required angles. And "along" a direction means having at least a component in that direction, preferably within 45 ° from that direction, more preferably within 20 °, even more preferably within 5 °.

In the illustrated embodiment, the main positive relay K1 and/or the main negative relay K2 may be horizontal relays. It will be appreciated that a horizontal relay, i.e. a relay in which the coil or spring is placed upside down, in other words, the central axis of the coil extends substantially horizontally. The horizontal relay can reduce the Z-direction space, and is particularly favorable for the arrangement requirement of a sedan type.

Preferably, the horizontal relay is arranged such that the center axis of the coil of the horizontal relay extends in the width direction X0. The extending direction of the central axis of the coil in the horizontal relay may be regarded as the direction of the horizontal relay. In this way, the direction of the horizontal relay may be perpendicular to the front-rear direction Y0, and thus, the directions of the relays K1, K2 may be substantially perpendicular to the traveling direction of the vehicle. This can avoid the vehicle to the mechanical damage of relay overload contact in the dynamic driving process, especially can avoid the adverse effect of Y to shaking to the relay.

Fig. 4 to 7 show an example configuration of the positive distribution box 1, and fig. 8 to 11 show an example configuration of the negative distribution box 2. Referring to fig. 6 and 10 in particular, each of the positive distribution box 1 and the negative distribution box 2 includes an upper case and a lower case separated in the height direction Z0. The upper and lower housings may be detachably coupled by fasteners. It is to be understood that the drawings are designed solely for purposes of illustration and not as an isometric view and that no limitation on the scope of the invention is intended.

In fig. 6, the positive distribution box 1 includes an upper case 11 and a lower case 12 separated in the height direction Z0. Referring to fig. 4 to 5, the positive distribution box 1 has a generally rectangular box shape, and a fastening member such as a bolt 71 may be coupled to the lower case 12 through two mounting holes 61 of the upper case 11, which are generally diagonally distributed, for example, a screw hole may be provided in the lower case 12, thereby detachably coupling the upper case 11 and the lower case 12 together. The upper housing 11 and the lower housing 12 may further be fastened by a fastener to assist the connection, such as a buckle or a latch.

In fig. 10, similarly, the negative electrode distribution box 2 also includes an upper case 21 and a lower case 22 separated in the height direction Z0. Referring to fig. 8 and 9, the negative distribution box 2 is also formed in a substantially rectangular box shape, and fasteners such as bolts 72 may be inserted through two mounting holes 61 of the upper case 21, which are substantially diagonally distributed, to be coupled with screw holes provided in the lower case 22, thereby coupling the upper case 21 and the lower case 22 together. The mounting holes 61, 62 may also be referred to as bolt fixing points.

The flatness of at least a portion of the upper surface of the upper housing of each distribution box may be set to less than 0.5mm, i.e., < 0.5 mm. At least one part of the upper surface is provided with a mounting position for mounting the battery management system. It is understood that the flatness of the aforementioned at least a part of the upper surface is the flatness of a part other than the mounting position for mounting the battery management system. The above arrangement can satisfy the mounting requirements of the battery management system without additionally providing a BMS mounting bracket, for example, in the battery compartment 40 mentioned later. Therefore, the space of the battery bin can be saved, the arrangement space of the battery core or the battery module is increased, and the cruising ability of the whole vehicle is increased.

In fig. 5 and 6, the upper surface 111 of the upper case 11 of the positive distribution box 1 is provided with mounting sites 63 for mounting the battery management system, two mounting points or mounting holes distributed in the front-rear direction in the drawing.

In fig. 10 and 11, the upper surface 211 of the upper case 21 of the negative distribution box 2 is provided with mounting sites 64 for mounting the battery management system, two mounting sites being distributed in the front-rear direction in the drawing.

As previously described, a relay may be housed in the distribution box. At this time, the positions of the upper housing and the lower housing of the distribution box corresponding to the relay may be provided with heat dissipation holes. Referring to fig. 6, the upper case 11 and the lower case 12 of the positive distribution box 1 are each provided with a heat radiation hole 71a at a position corresponding to the main positive relay K1. Referring to fig. 10, the upper case 21 and the lower case 22 of the negative distribution box 2 are each provided with a heat radiation hole 72a at a position corresponding to the main negative relay K2. The arrangement can reduce the working temperature rise of the relay in the working process of high current and effectively prolong the electrical service life of components.

As previously mentioned, a fuse may be housed in the distribution box. At this time, a heat dissipation hole may be provided in the upper case of the distribution box at a position corresponding to the fuse. Referring to fig. 10, heat radiation holes 72b are provided in the upper case 21 of the negative distribution box 2 at positions corresponding to the main fuse Fu. The arrangement can reduce the working temperature rise of the main fuse Fu during high-current working, and effectively prolong the electrical service life of components.

The

heat dissipation holes

71a, 72b may each include a plurality of holes in an array, each of the holes may be a strip-shaped hole, and an extension direction of the strip-shaped hole may coincide with the width direction X0 of the vehicle. Thus, arrangement and heat dissipation are facilitated.

Fig. 7 and 11 schematically show the distribution of devices in the positive distribution box 1 and the negative distribution box 2, respectively. In fig. 7, in the positive distribution box 1, the pre-charge resistor Rp is located between the pre-charge relay Kp and the main positive relay K1 in the width direction X0, where the pre-charge relay Kp is located on the left side and the main positive relay K1 is located on the right side. In fig. 11, in the negative distribution box 2, the main negative relay K2 is located on the right side, the main fuse Fu is located on the left side, and the shunt Sa is located in the right front orientation of the main fuse Fu. The arrangement fully considers the connection relation of all devices and the space characteristics of the distribution box and even the battery pack, so that the occupied space is less.

The pre-charge resistor Rp is located between the pre-charge relay Kp and the main positive relay K1 in the width direction X0, where the pre-charge relay Kp is located on the left side and the main positive relay K1 is located on the right side

In fig. 1, an interface (shown as "battery +" in fig. 5, in conjunction with fig. 5) of the positive distribution box 1 for accessing the battery module 20 may be located at an end 18 of the positive distribution box 1 that is distant from the negative distribution box 2 in the width direction X0. That is, in fig. 5, the interface of the positive distribution box 1 for accessing the battery module 20 may be located at the right end portion 18 of the positive distribution box 1. It is to be understood that, as mentioned earlier, the "battery +" in fig. 5 may be used as an interface to turn on the input terminal anode or the output terminal anode in the anode circuit S1 shown in fig. 2, respectively, according to the selection of the discharge and charge states. Also shown in fig. 5 is the location of the interface, shown as output +, which is also located at the right end 18 of the positive distribution box 1. It is to be understood that "output +" in fig. 5 may be used as an interface to turn on the output side positive or the input side positive in the positive circuit S1 shown in fig. 2, respectively, depending on the selection of the discharge or charge state.

In fig. 1, an interface (shown as "battery-" in fig. 9, in conjunction with fig. 9) of the negative distribution box 2 for accessing the battery module 20 may be located at an end 28 of the negative distribution box 2 that is distant from the positive distribution box 1 in the width direction X0. That is, in fig. 5, the interface of the negative distribution box 2 for accessing the battery module 20 may be located at the left end 28 of the negative distribution box 2. It is also to be understood that, as mentioned earlier, the "battery-" in fig. 9 may be used as an interface to turn on the input terminal negative pole or the output terminal negative pole in the negative pole circuit S2 shown in fig. 3, respectively, depending on the selection of the discharge and charge states. Also shown in fig. 9 is the location of the interface, shown as "output-", which is also located at the right end 28 of the negative distribution box 2. It should be understood that "output +" in fig. 9 can be used as an interface to turn on the output terminal negative pole or the input terminal negative pole in the negative pole circuit S2 shown in fig. 3 according to the selection of the discharging or charging state.

The above arrangement facilitates the wiring from both sides in the width direction X0. In addition, fig. 5 and 9 also show the positions of the interfaces "range plus", "range-", respectively, which can be used to switch on the electrically controlled positive and negative poles of the range extender, respectively.

The rectangular box-shaped positive electrode distribution box 1 described above can be controlled to have a box length dimension (dimension in the left-right direction), a box width dimension (dimension in the front-rear direction), and a box height dimension (dimension in the up-down direction) of about 211.5mm, 105mm, and 61 mm. The rectangular box-shaped negative distribution box 2 can be controlled to have a box length dimension (dimension in the left-right direction), a box width dimension (dimension in the front-rear direction), and a box height dimension (dimension in the up-down direction) of about 260mm, 102mm, and 67 mm.

As shown in fig. 1, the present invention also provides a battery pack 100 for a vehicle. As described above, the battery pack 100 includes the battery modules 20, and eight battery modules 20 are shown in the drawing. The battery pack 100 may also include the battery system distribution box 10 described above. In the illustrated embodiment, the battery system distribution box 10 is located at the front side of the battery module 20. This facilitates high and low pressure arrangements.

As mentioned above, the battery pack 100 may further include a water cooling tube 30 for cooling the battery module 20. The water cooling pipe 30 may be provided to pass through a space between the positive distribution box 1 and the negative distribution box 2 of the battery system distribution box 10. That is, as shown in fig. 1, the water cooling pipe 30 passes through a space between the positive electrode distribution box 1 and the negative electrode distribution box 2 in the width direction X0 substantially in the front-rear direction.

The battery pack 100 may further include a battery compartment 40. In the illustrated embodiment, the battery compartment 40 provides a first accommodation area a1 of a rectangular shape and a second accommodation area a2 of a trapezoidal shape for accommodating the battery module 20 and the battery system distribution box 1, respectively. Wherein the base side at the rear side of the trapezoidal shape constituting the first accommodation area a1 coincides with the side at the front side of the rectangular shape constituting the second accommodation area a 2. In fig. 1, the bottom side of the trapezoidal shape is shown by a broken line La, and the front side of the rectangular shape located on the front side is also superimposed on the bottom side.

It will be appreciated that the above shapes are merely for convenience in describing the configuration thereof and are not intended to be actual boundaries thereof, e.g., where no actual housing wall is provided at the base of the trapezoidal shape and the sides of the rectangular shape for separation.

In other words, the first accommodating area a1 is enclosed by the front sidewall 81, two inclined sidewalls 82 extending from two ends of the front sidewall 81 obliquely backward, and the dashed line La. And the second accommodation area a2 is enclosed by the aforementioned dotted line La, two straight side walls 83 extending rearward from the rear ends of the two inclined side walls 82, respectively, and a rear side wall 84. The first accommodation area a1 and the second accommodation area a2 may have a substantially symmetrical shape, and a plane of symmetry thereof may be a substantially vertical plane extending in the front-rear direction, and the

distribution boxes

1, 2 are respectively disposed on both sides of the plane of symmetry. In fig. 1, the box length direction of each

distribution box

1, 2 may be arranged to coincide with the width direction X0 of the vehicle. The dimension of each

distribution box

1, 2 in the height direction Z0 may be smaller than the height dimension of the battery module 20. The arrangement described above can effectively utilize the front space of the battery compartment 40, and can reduce the overall occupied space of the battery pack 100.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. A battery system power distribution box for a vehicle, the vehicle having a width direction, the battery system power distribution box comprising:

the positive power distribution box contains devices in a positive circuit, and the positive circuit is used for communicating the positive electrode of the input end with the positive electrode of the output end; and

and a negative distribution box which is arranged separately from the positive distribution box along the width direction and contains devices in a negative circuit for communicating the input end negative electrode and the output end negative electrode.

2. The battery system distribution box of claim 1,

the positive circuit comprises a positive main circuit, and devices in the positive main circuit comprise a main positive relay;

the positive circuit further comprises a pre-charging circuit connected with the positive main circuit in parallel, and devices in the pre-charging circuit comprise a pre-charging relay and/or a pre-charging resistor; and/or

The devices in the negative pole circuit comprise a main negative relay and/or a main fuse.

3. The battery system distribution box of claim 2,

the main positive relay and/or the main negative relay is a horizontal relay.

4. The battery system distribution box of claim 3,

the horizontal relay is arranged such that the central axis of the coil thereof extends in the width direction.

5. The battery system distribution box of claim 1, wherein said vehicle has a height direction;

each of the positive and negative distribution boxes includes upper and lower cases separated in a height direction, and the upper and lower cases are detachably connected by a fastener.

6. The battery system distribution box of claim 5,

at least a part of an upper surface of the upper case of each distribution box, which is provided with a mounting site for mounting a battery management system, is set to a flatness of less than 0.5 mm.

7. The battery system distribution box of claim 5,

a relay is accommodated in the distribution box, and heat dissipation holes are formed in the positions, corresponding to the relay, of the upper shell and the lower shell of the distribution box; and/or

The distribution box is internally provided with a fuse, and a heat dissipation hole is formed in the upper shell of the distribution box and corresponds to the fuse.

8. A battery pack for a vehicle, the vehicle having a front-rear direction, the battery pack including a battery module, characterized by further comprising:

the battery system distribution box of any of claims 1 to 7, located on a front side of the battery module.

9. The battery pack according to claim 8, wherein the battery pack further comprises:

and a water-cooling pipe for cooling the battery module, the water-cooling pipe being disposed to pass through a space between a positive distribution box and a negative distribution box of the battery system distribution box.

10. The battery pack according to claim 8,

the battery pack further comprises a battery bin, the battery bin is provided with a first containing area in a rectangular shape and a second containing area in a trapezoid shape, and the first containing area and the second containing area are used for containing the battery module and the battery system distribution box respectively, wherein the bottom edge of the trapezoid shape, which is located on the rear side, coincides with the front side edge of the rectangle shape, which is located on the front side.